Hello, how are you Andrew?
I have the same problem, yesterday I bought the DLC Mass Transit, first on the Play station web and then on the Paradox page.
With the Play station DLC, I could download on the PS4, but in the actual game it still shows locked in the new game/scenario menu.
I bought the original game on Amazon, a CD, the region is 2. Dont know the region of the DLC (where can I find it?). Trying to contact Play station but it is impossible.
In the other hand I have the same DLC that i bought on Paradox, when I tried to activate the product on Steam, this appear: The product code you've entered requires ownership of another product before activation.
If you are trying to activate an expansion pack or downloadable content, please first activate the original game, then activate this additional content.
Can you please help me with this! My son is obsessive to use it!!!!
Thanks!
Cynthia